See the description of Birkengang. The paragenese of Heinrichshutte is quite comparable of that of Birkengang, although there are differences. Most of the fields of view are less than half a cm down to just 2-3 mm. Do you see errors in the identification? Again the pieces originate from a huge pile of material from a known collector from the Stolberg area. Only a few have a label, mostly those that I obtained later.